Duan, Ji Kai
Bai, Yu Long
Wei, Qiang
Fan, Man Hong
Funding for this research was provided by:
National Natural Science Foundation of China (41861047)
Northwest Normal University Young Teachers’ Research Capability Enhancement Team Project (NWNU-LKQN-1706)
Article History
Received: 10 December 2018
Accepted: 15 April 2019
First Online: 12 June 2019